Mark Spritzler wrote:(ps, I don't know the exact story, so this is my take on the whole thing)
It's probably close to the truth:
Ted Husted, developer of Struts admitted in an email that WebWork is very similar to Struts 1.x and in fact does certain things better than Struts. Both Husted and Lightbody's rationale was that combining WebWork's superior technology and Struts' superior community could only have a good effect on the Java community as a whole.
Wiki on WebWork
Not that it's a bad thing. I think Struts 2 is a big improvement over Struts 1.